Installation considerations: Using the .NET Compact Framework on Windows Mobile

Although ADO.NET 3.5 is the most recent version of the API, the majority of devices that SQL Anywhere supports have only ADO.NET
1.x support installed. To use ADO.NET version 2.0 or 3.5 on a device, download and install the support for ADO.NET 2.0 or
3.5 from Microsoft on your device.